footer{
    z-index: 999;
    display: flex;
    width: 7.5rem;
    height: 0.98rem;
    background: white;
    position: fixed;
    justify-content: space-around;
    bottom: 0;
    box-shadow: 7.5rem 0.98rem 0.05rem black; 
}
footer>a{
    display: flex;
    flex-direction: column;
    text-align: center;
    color: #8e8e8e;
}
footer>a>i{
    font-size: 0.36rem;
    margin-top: 0.15rem;
}
footer>a>span{
    height: 0.45rem;
    line-height: 0.45rem;
    font-size: 0.2rem;
}